Hume EVI vs Vapi

For a no-code agency building and reselling voice AI, two things matter most: a no-code builder and white-labelwhite-label - Rebrand the product as your own to resell it to clients. or sub-account support. Both platforms offer a no-code agent builder, so that is a wash. On white-label and sub-account capability, Vapi offers partial support while Hume EVI publishes no white-label information at all, giving Vapi the edge on the single most agency-critical differentiator. Production cost also favors Vapi: its base rate of $0.05/min beats Hume EVI's $0.07/min, and Vapi passes LLM and TTS costs through at cost. Vapi also charges no monthly platform fee versus Hume EVI's $3/mo, and Vapi includes native outbound campaigns, a feature Hume EVI has no equivalent for. Agencies reselling at volume will find Vapi's lower per-minute rate and broader agency tooling meaningfully more competitive.

Both platforms support bring-your-own LLMBYO LLM - Bring your own language model - use an OpenAI, Anthropic, or self-hosted endpoint instead of the platform default. and are fully API-first, so those critical capabilities are matched. For engineering teams, the deciding factors are latency, native SIP trunking, and testing tooling. Hume EVI's 300 ms median latency versus Vapi's 600 ms is a real advantage for Hume EVI, but Vapi counters with native SIP trunking and a built-in simulation and testing suite, both of which matter significantly for custom pipeline control. Both support bring-your-own TTS voice. Vapi's SIP trunking and testing suite capabilities tip the balance for engineering teams building production pipelines.

For ecommerce support and order flows, the most critical factor is connecting to the tools that power online commerce. Vapi integrates natively with GHL, Twilio, Telnyx, Slack, Google Calendar, Zapier, and Make, covering the automation and CRM ecosystem ecommerce teams rely on. Hume EVI lists LLM providers and SDKs but no commerce-focused integrations. Vapi also includes a built-in knowledge base, essential for product and order FAQs, while Hume EVI has no such capability on record. Vapi charges $0/mo platform fee versus Hume EVI's $3/mo, and both offer self-serve signup. Vapi's native DTMFDTMF - Touch-tone keypad input - the tones when a caller presses 1-9./IVR support further suits order-flow navigation.

For HIPAAHIPAA BAA - A signed Business Associate Agreement that lets you handle protected health information under US healthcare privacy law.-bound healthcare workflows, the single most critical requirement is a HIPAA BAA. Hume EVI includes the HIPAA BAA on its base plan, while Vapi treats it as a paid add-on, immediately putting Vapi at a disadvantage for compliance-sensitive buyers. Vapi also has no SOC 2 Type II certification, another serious gap for healthcare procurement teams. Both platforms offer consent and recording compliance tooling, so that is a wash. Hume EVI's verified HIPAA coverage on day one, combined with Vapi's documented absence of SOC 2, makes the compliance case decisively one-sided.

For outbound sales campaigns, the most critical factor is whether a platform natively supports outbound campaigns at scale, and Vapi explicitly offers native outbound campaigns while no equivalent capability is documented for Hume EVI. That single gap is decisive. Beyond that, Vapi's base concurrencyconcurrency - How many phone calls the platform can handle at the same time. of 10 simultaneous calls with the ability to add more at $10/mo per line is essential for high-volume dialing, and Hume EVI publishes no comparable concurrency facts. On real production cost, Vapi runs $0.05-$0.17/min versus Hume EVI's base of $0.07/min, keeping Vapi competitive even at the higher end. Native SIP trunking and warm transfer to human are both confirmed for Vapi, rounding out a complete call-center feature set. Hume EVI's 300 ms latency advantage is appealing but latency is a secondary concern when the outbound campaign infrastructure itself is absent.

For an SMB running a receptionist and booking service, keeping overhead costs low is the deciding factor. Vapi charges $0/mo platform fee versus Hume EVI's $3/mo, which matters when margins are tight. Beyond cost, Vapi offers a built-in knowledge base and native warm transferwarm transfer - Handing a live call to a human with context passed along, rather than a cold drop. to human, both critical for a receptionist workflow, while no equivalent facts exist for Hume EVI on those features. Vapi also supports in-platform number provisioning. Both offer a no-code agent builder. Vapi's real production cost runs $0.05-$0.17/min versus Hume EVI's $0.07/min base, making Vapi more budget-friendly for call-heavy SMBs.